All Questions
313,245
questions
-1
votes
0
answers
17
views
How to clean up server disk space (without breaking any sites)? And figure out which apps are using how much RAM (via the terminal)
I am using RunCloud on top of a DigitalOcean droplet, and my web apps (in total) use only 2.2GB.
I want to downgrade my droplet, but I need to clear as much disk space as possible (as well as check ...
0
votes
1
answer
23
views
Deprecation of OrganizationalUnit in Subject of TLS Certificates
Recently we got a mail from our certificate provider that they are removing the OU field from Subject of new/renewed certificates after 1st September.
This is related to decision made by Certificate ...
0
votes
0
answers
22
views
Nginx: aim at two applications
I need the Nginx service to be set that if I call the main directory it must call an app, if I call a subdirectory it must call other app, for example:
www.website.com -> localhost:8080
www.website....
0
votes
0
answers
11
views
Performance improvement for Innodb - High CPU
I have a dotnet application that has a high-traffic connection to the MySQL database. It's an application that stores IoT data. It connects to the database approximately 50 times per second. In these ...
- 101
0
votes
0
answers
21
views
OVH IPv6 on ESXi -> pfSense -> VM setup
Currently setting up some VMs on an ESXi host on an OVH machine. I have two IPv4s on OVH including a virtual MAC address as needed by OVH. One IPv4 for the ESXi host itself, another one for the ...
1
vote
0
answers
46
views
Hyper-V 2019 Core Server can't install windows defender update KB4052623?
I am having a problem with installing the "Update for Microsoft Defender Antivirus antimalware platform - KB4052623 (Version 4.18.2205.7)" Update on my Microsoft Hyper-V Server 2019 Core ...
- 11
0
votes
1
answer
19
views
Debian 11 - Low entropy (256) even with Haveged and rng-tools on old laptop
I have a problem with an old laptop.
I have installed a debian 11 operating system on it a year ago, and despite using it almost daily to perform network administration, I recently found its available ...
- 23
0
votes
0
answers
10
views
How to disable `tcp_slow_start_after_idle` only for selected interface or route?
I'm running a server with multiple network interfaces (some are VLAN interfaces). Some of the connections are in local network with highly bursty traffic over TCP meaning they suffer at lot from ...
0
votes
0
answers
13
views
Kubernetes Network Namespace descriptio
I am new to detailed networking. I am trying to understand the details on how kubernetes networking works.
Network Namespace cni-0ed19206-6689-517c-cad4-e85b587fcc10
When I run following command
ip ...
- 111
0
votes
0
answers
24
views
Port forwarding from external network to localhost
I have a service listen on 127.0.0.1:8080, and I only want to export port 80 to outside. I tried port forwarding but no success. So how can I forward port 80 to localhost:8080?
This is what i tried:
...
- 1
0
votes
0
answers
16
views
File Creation/Deletion over SMB sometimes happening in 25 microseconds
Scenario:
I am Creating and Deleting a File in my program using the following OS calls:
In Windows:
CreateFileW ((LPCWSTR) filename, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE | ...
0
votes
0
answers
14
views
Cloud platforms CDN: is it possible to make specific API request going through CDN caching?
I have encountered many Apps that has a server-side handler with the following features:
(1) The App makes "pictures, musics" that needs to be downloaded going through a CDN caching network ...
google-cloud-platform
0
votes
0
answers
12
views
Repair a Hyper-V cluster
Due to the error
Cluster network name resource 'Cluster Name' failed registration of
one or more associated DNS name(s) for the following reason:
DNS bad key.
I have planned to perform a repair of ...
- 11
0
votes
0
answers
13
views
Can't mount a NFS share on File server rule running in Windows Failover Cluster
On Microsoft Windows Failover Cluster (Windows Server 2019 Datacenter) I've created a File Server role and created a NFS share (similar to how it's described in these instructions). The idea was to ...
- 221
0
votes
0
answers
25
views
vmdk image without /dev/root
I have vmdk server image without /dev/root, I want to deploy it with DigitalOcean (they support custom images). I created images, started droplet, but unable to connect via ssh. I entered ...
- 101
0
votes
0
answers
5
views
Enalble Writable FTP or Samba on a ZTE Router(Shipped as Airtel Nokia Router)
I have enabled ftp as well as Samba service for the usb device connected to my router. However, both are readonly.
I see that tplink routers can be configured to use ftp in writeable mode as well - ...
0
votes
0
answers
10
views
What is the timeout duration of file read/write OS calls on network based on?
Scenario:
I have shared a file over SMB, on a linux server, and accessing it using another linux client.
Linux Client opens the file using open OS call.
Linux Server is disconnected from the network.
...
0
votes
0
answers
27
views
Ubuntu 18.04 Server uses only 2GB RAM even under high load
my Ubuntu 18.04 Server has 64GB RAM but when I check via htop it never uses more than 2 GB RAM. This also happens if I install Web Apps or if I create database dumps. I would expect my server to use ...
- 1
0
votes
0
answers
5
views
Nginx: Relationship between number of client connections and Nginx performance
I am benchmarking an open-sourced application(Social networking application) using wrk2 as the workload generator. If I keep the load constant (requests per second) but increase the number of ...
- 101
0
votes
0
answers
13
views
Hwo to trim email addresses in Exim?
I have a list of emails from client accounts that are built like this: name+somegiberish@gmail.com
I have tied looking into configs but haven't found such an option.
How do i trim in Exim those emails?...
- 125
1
vote
0
answers
14
views
Why lock on a file shared over SMB taking only 3 microseconds?
I used the following C++ functions to lock 1 byte of a file that is shared by server via SMB:
On Windows:
LockFileEx (h, LOCKFILE_FAIL_IMMEDIATELY | LOCKFILE_EXCLUSIVE_LOCK, 0, 1,0, &overlapped)
...
0
votes
1
answer
17
views
What's it called? Feature in remote desktop software? Client is told to put a code in a website which starts a remote desktop session?
I saw it once while I was fixing this one guys computer.
We went to a website and put some numbers in a box. These numbers then prompted an executable which we downloaded and ran, which then started a ...
0
votes
0
answers
15
views
AWS limited account: 3 days at time of writing and nothing changed
I have a AWS account.
Because they thought it was compromised (I did access from a new location as root) they wrote me and denied some functions (e.g. lambda).
Now, I'm writing them from 28/06/2022 (4 ...
- 111
0
votes
0
answers
9
views
Use AWS SAM to Create AWS Lambda Layer for Python (Serverless Application Model)
I'm trying to use AWS SAM / Serverless application Model to deploy a combination of Python and native libraries to Lambda as a layer, for use from a Python Lambda function. I'd appreciate some help ...
- 29.6k
0
votes
1
answer
12
views
podman: why need host network mode
As per man podman-run container's network can be configured in the host mode:
--network=mode, --net
...
host: Do not create a network namespace, the container will use the host’s network. Note: The ...
- 209
0
votes
0
answers
11
views
dnsmasq, one host on multiple vlans
I have dnsmasq configured to serve static dhcp on two networks; one on the primary interface and one on a vlan attached to the primary interface. The interface config looks like this:
3: enp2s0: <...
- 40.4k
0
votes
0
answers
22
views
What's the best practice for internal-only DNS server?
Suppose a company has both public web server (say, www.example.com) and DNS authoritative server hosted by cloud service provider (say, AWS). Inside HQ, the local area network is divided into subnets ...
- 123
0
votes
0
answers
8
views
CORS with Auth module in Apache2
I am triying to set up a data server that restrict the access to the public but allows access from a host or domain, but at the same time I need to enable CORS, this is what I tried in my virtualhost ...
0
votes
0
answers
10
views
Proxmox Internal Network
I am in need of a internal network on my Proxmox 7.2 installation. I want to use a reverse proxy server to connect all of my VMs to the internet. That way I only have the need for one WAN address.
I'm ...
- 1
0
votes
1
answer
6
views
Tableau hyper_0 process fails with result code 7
Our Tableau on a linux docker image entered a degraded state. When I ran tsm status -v I got the following:
node1: localhost
Status: DEGRADED
'Tableau Server Gateway 0' is running.
...
- 131
0
votes
0
answers
29
views
Setting up multiple instances on a single server
I've made a business management software. It runs on Django - Gunicorn - PostgreSQL - Debian - Nginx - Amazon Lightsail. I want to move it to a server I am setting up in my basement on Dell R620. I ...
- 115
0
votes
1
answer
28
views
Azure new Virtual Machine Windows Server 2022 can't make IIS work for a simple website
I got a new Azure Virtual machine server 2022 datacenter edition, they don't have the option "endpoints" where you configure the port 80 for http, I tried option "networking" 'add ...
0
votes
0
answers
22
views
In a domain network after a while "unidentified network", where to dig?
A domain is deployed on the server (AD, DNS, DHCP, routing and network):
two network cards (one looks to the Internet, ip like 10.x.x.x, the other to LAN - ip 192.168.1.5)
turned DNS (forward and ...
0
votes
1
answer
35
views
Running out of TCP ports in linux(Red hat) while doing load test
I'm doing load test for 30000TPS(transaction per second) using gatling, I facing the following error
i.n.c.u.Errors$NativeIoException: newSocketStream(..) failed: 99128 (99.43%)
Too many open ...
- 101
0
votes
1
answer
27
views
How to resize Partitions on Proxmox?
Hey im Hosting Proxmox on a Small Hosting Provider and after i added more Space to my "sda" Proxmox refused to start and i wasnt able to go on the WebInterface.
I still was able to go into ...
0
votes
0
answers
10
views
How to enable SSL Proxy only on certain Locations in Apache
I am trying to use Apache as reverse proxy.
For some locations I want to convert the client's HTTPS request to HTTP requests on the server.
For another location I want to keep the client's HTTPS ...
- 101
-1
votes
1
answer
22
views
Encrypted Disk (LUKS): Upgrading from RHEL 8 to RHEL 9
Known limitations - Notable known limitations of Leapp currently include:
Encryption of the whole disk or a partition, or file-system encryption currently cannot be used on a system targeted for an ...
- 99
0
votes
1
answer
31
views
DNS strange behavior for VPN addresses
I'm having this strange behavior when I connect to my company VPN using barracudavpn (my OS is Fedora 36). After connecting network configuration seems ok:
$ route -n
Kernel IP routing table
...
- 131
0
votes
0
answers
15
views
Kubernetes Pods Getting in Pending State Forever
We have a CronJob which will run every 'x' minutes.
For each and every Schedule, A Pod will be Scheduled and it runs and it is doing its job.
Now, After 2-3 days, The Pod is getting into Pending State ...
- 101
0
votes
0
answers
21
views
Virtual Switch of Hyper-V remove outer tag of QinQ packet using both 0x8100 EtherType
I have vyos virtual machine using one network adapter in Hyper-V server. I configure the only network adapter to trunk mode:
C:\> Get-VMNetworkAdaptervlan -VMName $VM | fl
VMName : ...
- 327
0
votes
0
answers
26
views
How to block the executable file upload in web server [migrated]
I am working on a web app project to block all the file executable from file upload.
Example: user can upload, txt, png, image and video files and not any executable scripts like, Perl, Python, exe, ...
- 205
0
votes
0
answers
14
views
Apache shows 404 but on localhost Spring app works
I've installed Tomcat 9, Apache httpd 2.4.6, and Let's Encrypt for SSL, on Centos 7 on the Google Cloud instance. It's the second time I'm doing this configuration so I was using the similar ...
- 23
0
votes
0
answers
14
views
Proftpd "Can't open PID file /run/proftpd/proftpd.pid (Yet?)"
I'm currently running into the following error with my Proftpd install:
Can't open PID file /run/proftpd/proftpd.pid (yet?) after start: No such file or directory
However when I run ls /run/proftpd/ ...
0
votes
1
answer
12
views
Hide Task Scheduler Error message
I have a scheduled task that runs a bat file silently on the local computer. When the file is in place everything works fine, but if it is missing task scheduler will throw up an error that bothers ...
- 11
0
votes
1
answer
17
views
domain "alias" in LAN
I have the following setup:
a registered domain, domain1.com, with several websites/webapps under different subdomains: sub1.domain1.com, sub2.domain1.com etc.
on my LAN I have a pfsense router and
a ...
0
votes
0
answers
7
views
Apache2 htaccess issues when using vhost_alias
I have the vhost_alias module set up and loaded, and have the following in a host file inside sites-enabled
UseCanonicalName Off
<VirtualHost *:80>
ServerName vhosts.local
...
- 121
0
votes
0
answers
19
views
docker swarm nfs volume not showing all directories
I've hit a wall with trying to figure this out. I'm running docker swarm on two nodes and I created an nfs volume to my synology.
Inside of the container:
root@container:/data# ls -ltr
drwxr-xr-x 4 ...
- 193
0
votes
1
answer
27
views
How to prevent changing ownership of '/data/db' in mongodb pod
I'm running a mongodb instance as a kubernetes pod in a single node cluster (bare metal ubuntu machine). The volume is configured ReadWriteOnce as the mongodb pod is accessed only by pods in one node.
...
- 121
0
votes
0
answers
14
views
pam radius bypass same local user (exception user)
Pam Radius login works with the following configuration.
However, it would be necessary for some users to perform local authentication. How can I solve this?
[xxxxxxxxxxx ~]# cat /etc/pam.d/sshd
#%PAM-...
- 1
0
votes
1
answer
49
views
mdadm raid1 irregular degraded without reason
My raid1 went to degrade state from time to time. Then my application crashes, because the raid is in read-only mode. After a reboot the raid is working fine again. Now I want to find out whats the ...
- 3